{
  "manageEntity": {
    "action": "Create",
    "entityId": "404269495",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"title\":\"10 Brass.wav\",\"is_stream_gated\":false,\"is_unlisted\":false,\"field_visibility\":{\"genre\":true,\"mood\":true,\"tags\":true,\"share\":true,\"play_count\":true},\"is_downloadable\":true,\"stem_of\":{\"category\":\"OTHER\",\"parent_track_id\":193473653},\"owner_id\":653598798,\"track_cid\":\"baeaaaiqsecyldkixqbaool5oyqsv2h6y77gvwdjjpneirgpfvrhmrlwlnk5mm\",\"orig_file_cid\":\"baeaaaiqsebib5l3pyaz6av7e75vqwsiarf3wq3fcvq3pcyk2ub5uwizhmojjk\",\"orig_filename\":\"10 Brass.wav\",\"audio_upload_id\":\"671adeccaf0e89ba0d9ea41548c99d9c\",\"duration\":207,\"audio_analysis_error_count\":1}}",
    "nonce": "0x4fbec69e8015181f9e7cff2858c1e91ab33b06fefe9d68cb565b3d819fe30340",
    "signature": "0xc86401166aa913c87f4ec8d65b32416894868b77d072d1bf6212ca5ecaa025d3425853172c2d0a0b3dc71154f44e00e2a263cab8c08047b6d7f7198db3e3673f1b",
    "signer": "0x14A55CAAD52a18f76025A94865ce06ED8A0Ea2cC",
    "userId": "653598798"
  }
}